Boom-guy for steam-shovels and the like.



No. 027,000. `PAT-15.11111111 JULY 31, 1900.

w. 111111110 130010: GUY P011 STEAM sHovELs 111111021111111110.

` AP'PLIOATION FILED 1130.1, 1905.

` 2 SHEETS-SHEET 1.

No. 027,300. PATENTED JULY 31,1906.

l 0 W. mams. n .BOOM GUY FOR STEAM sHovELs AND 'PERLIER APPLICATION FILED DE.1,1905.

2 SHEETS-SHEET 2.

me Marius-ramas col, wasnmaran, n. c.

-will enable others Skilled in the i UNITED STATES WALTER EEEEIS; THE BUCYEUS COMPANY, OE CORPORATION OE WISCONSIN.

.PATENT OEEIOE I OF SOUTH MILWAUKEE,

WISCONSIN, ASSICNOR To SOUTH MILWAUKEEQWISCONSIN, A

Specication of Letters Patent.

Patented J' uly 31, 1 906.

Application led December l, 1905. SeralNo, 289,798.

To @ZZ whom t may concern:

Be it known that I, WALTER FER-EIS, a citizen of the United States, residing at South Milwaukee, county of Milwaukee, lState of VVisconsimhave invented certain newrand useful Improvements in Boom- Guys for Steam-Shovels and the Like; and I do hereby declare the following to be a full, clear, and eXact description of the invention, such as art to which 1t appertains to make and use the same.

- frame collar as the The invention relates to steam-shovels and like excavator apparatus, and has for its object' to provide a simple and efficient arrangement of guys for supporting the swinging'boom of such ap `aratus, adapted to take up independently tlie loads imposed upon each Side of the boom and to protect all portions of the boom below the points ofthe attachment of the guys from torsional strains.

To this end the invention comprises a pair of boom-guys connected to the sides of the boom, preferably at the Saddle-block bearings just below the shi per-shaft and running thence in lines which if prolonged would intersect at the center of the A-frame collar. In order to provide for the turning of the A- boom swings to right or left without imposing bending strains on the guy-rods, said A-frame collar is referably connected to the boom by suitable means which will insure the proper degree of movee boom. drawings, Figure 1 e forward end of a ment of said collar with t In the accompanyin is a side elevation of t,

steam-shovel having the invention applied thereto. Fig. 2 :is an enlarged plan view thereof, certain of the parts being omitted to avoid complication; and Fig. 3 is a Similar view showing a slightly-modiiied form ofthe invention. A

According to the usual engineering practice it has been customary to support the swinging booms of Steam-shovels and like apparatus bymeans of two boom-guys arranged parallel to each other o n opposite sides of the boomand connected to the outer end of the boom at one end and to laterallyprojecting lugs on the A-frame collar at the other. With vthis arrangement of widely separated and substantially parallel 'boomguys there is no connection between the guy on one side of the boom and the opposite Side held in proper operative y res ect to the boom ofthe A-frame collar, and therefore there is no way of loading one of these boom-guys heavier than the other. If the boom receives an excessive load on one side near the ulpperf end, the tendency of the boom-@uy on t at side to receive and support such merely results in the strain being delivered by means of the A-frame collar as an equalizer to the vother boom-guy, and the unequal loading is eventually resisted by the torsional strength of the boom itself twisting against the foot-sockets, To obviate these difficultiesand to relieve the boom of twisting strains'at all points below the shipper-shaft, the vpresent invention contemplates the provision of guy-rods which are connected at lone point to an A-frame collar and diverge from the center Of the latter to points where they are connected on opposite sides of the boom in the rear of the shipper-shaft.

' In the accom Vanying drawings, a indicates the car-bo y or other support of the steam-shovel, and' I) the' swinging boom, which ismounted upon the usual rotatory platform. Passing through the boom t isY the handle e of the dipper c, which di perhandle is rovided on its-under face wit the usual rac which engages the thrusting-pin- Ions mounted upon the shipper-shaft g.'

This latter shaft is referably mounted in bearings formed in tlib side plates or brackets securejd to the sides of the boom. The thrusting-pinions are driven by gears 7L, likelwise mounted upon the shipper-shaft and receiving rotatory motion from smaller gears 7c 'on the crank-shaft of the,v operating engine or motor j. The rack on the dipper-.handle is vengagement with the thrustIng-pinions on the shi means of the usual saddle-bloc f, which is mounted upon the shipper-shaft and surrounds the handle, so that thel latter may slide freely backward and forward through the saddle-block and said saddle-block may have the necessary rotatory movement with to permit the dipper and its understood by those skilled in the art.

The dipper is preferably' operated by means of a double-cable suspension-that is to say, two cables n are connected to opposite points of the bucket, referably near the upper rear corner thereo and each cable is load andle to be raised and lowered, as will be per-shaft by upon the usual power-drum mounted upon f the car-body of the apparatus.

It .will be apparent that if the boom b were supported by the ordinary arrangement of parallel guys running from the lateral lugs of the A-frame collar to the end of the boom and an excessive load were imposed upon one side of the boomas, for instance, when the bucket struck hard soil or rock at one corner-practically the entire strain would be imposed u on the boom, as a twisting moment transmitted to the boom from the guy on the side which received the overload, thence by way of the A-frame co1- lar to the other guy. In this way the A- frame collar serves to act as an equalizer between the two separate boom-guys and serves to throw practically all the torsional strain into the boom itself. According to the present inventioninstead of connecting the boomguys to the sides of the A-frame collar and the outer end of the boom the guys w w are connected to the boom by means of lugs or extensions on the plates or brackets t, which form the bearings for the shipper-shaft, and said guys run thence on converging lines, which would intersect at substantially the center of rotation of the A-frame collar t, said guys being connected by suitable lugs or ears v to said collar. In order to cause the `A-frame collar to rotate as the boom swings to right or left, the said collar is connected to the boom by means of light rods said rods being connected to the collar at one end by the usual lateral lugs u and to the boom at the other by the bolts which connect the guys with the plates t. These rods supply the necessaryforce to overcome the friction between the A-frame collar and its bearing and cause said collar to turn without putting lateral strain on the boom-guys, which being connected in line with the center of the A- frame have no turning moment on the collar. It will be apparent that by this arrangement the guys take up independently the loads imposed upon each sid'e of the boom and protect all portions of the boom below the point of attachment of the guys from torsional strains.

In the modified form of the invention the means for causing the A-frame collar to turn with the boom consists of a simple plate o1' frame y, rigidly attached to the collar and having at its outer end a fork which embraces a pin 2, projecting from the upper surface of the boom, so that as said boom swings to the right or left a corresponding rotatory motion is imparted to the collar.

1. In an excavator, the combination of a boom, an A-frame mounted near the foot thereof, and guy-rods connected to opposite points on the boom and to a common point on the A-frame collar.

2. -In an excavator, the combination of a boom, an A-frame mounted near the foot thereof, and guy-rods connected to opposite points on the boom below the sweep of the dipper-handle, and to a common point on the A-frame collar.

3. In an excavator, the combination of a boom, an A-frame mounted near the foot thereof, and a pair of guy-rods attached to the boom at opposite sides thereof and to the A-frame collar in such manner that the prolongations of the medial lines of said guys would intersect at the center of the A-frame collar.

4. In an excavator, the combination of a boom, an A-frame mounted near the foot thereof, guy rods connected to opposite points on the boom and to a common point on the A-frame collar, and means connecting the collar and boom to cause the latter to rotate as the boom swings.

5. AIn an excavator, the combination of a boom, an A-frame mounted near the foot thereof, guy-rods connected to a common point on the A-frame collar and to points on WALTER FERRIS.

Witnesses:

RIDGELY FLETCHER, HARRY B. HAYDEN. 

